Milling machine



L. F. NENNINGER EF AL MILLING MACHINE Filed Feb. l5, 1930 Dec. l2, 1933.

Patented Dec. 12,4 l1933 viia'rlaN'r OFFICE p V"MlLL'IYN'cL Machine Lester F. Nenninger `and Fred A. Hassmam Cincinnat; Ohio, assgnors to The lCincinnati Milling'Machine Company, Cincinnati, Ohio,

a corporationI of Ohio A Application February 1'3, Serial No. 428,167 v y 3 Claims. (Cl. 90-711) `This invention relates to milling machines'and more particularly to a chip guard for the tripping mechanism. l W Y l y In modern machine tools which have been designedfor high'production, Vthe amount of ma.-

terial removed.' in" the form.l of chips per unit of time has increased and, due to the automatic or semi-automatic operation of such machines, the operators time is mostly consumed in loading and unloading Work pieces therefrom, whereupon the quantity of chips removed more or less pileup on the machine and it has been found that they have a tendency to interfere with the proper operation of the control mechanism of such ma- 15. chines. It is therefore one of the principal objects of this invention to provide a chip guard for the control mechanism of a machine tool having a reciprocating table which is adapted to cooperate With thetable to prevent any interfer- 29 ence with the control mechanism thereof.

Other objects and advantages of the present invention should be readily apparent by reference to the following specifications, considered in conjunction with the accompanying drawing illustrative of one embodiment thereof, but itis to be understood that any modifications may be y made in the specific structural details hereinafter disclosed, within the scope of the appended claims without departing from or exceeding the spirit of 130 the invention.

Referring to the drawing, in which like reference numerals indicate like parts:

Figure l is a plan view of a machine tool showing one embodiment of the invention. Y Figure 2 is an elevation of the parts shown in Figure 1, and

Figure 3 is a vertical section on the line 3 3 of Figure 1.

Figure 4 is an end elevation showing a modified r40, form of the invention.

The reference numeral 10 indicates the bed of the machine, upon which is slidably mounted the work table 11. The bed 10 has a raised boss 12 in which is pivotally mounted the trip control member 13 which Ais adapted to co-operate with dogs such as 14 mounted on the longitudinal edge of the table 11 to control the movement thereof. The boss 12 of the bed has the vertical flange 13 attached thereto as by bolts 14. A chip guard 15 which has a curved back is removably `positioned over the trip plunger 13. The guard 15 has a longitudinal strip 16 attached adjacent A its lower edge, forming a longitudinal slot by means of which it may be held in position by engagement with the flange 13. The guard 15 has formed integral therewith et eeen end, the flange portions 1.7 and 18.

The table 11 has attached to its longitudinal ledge the sloping flange 19 which extends the full.

length of thetable and is attachedthereto as by means ofv thewbolts 20. The flange 19 it will be noted overlaps `the top of the guard 15 so that chips or other material falling from the table 11 onto the flange 19 will slide off onto the'back of the guard 15. The back of the guard however is curved so that loose material such as falling chips will not collect thereon but will be precipitated therefrom to the edge of the machine and thus be prevented from interfering with the control member. The member 19 alsoprojects far enough from the table 11 to prevent `chips from falling or piling up in the way of dogs 14. Although the guard 15 extends only a short distance on each side of the trip member 13 it will be noted that the flange 19 extends the full length of the table and dueto the overlapping' of the parts the table may be moved or reciprocated to any position without exposing the member 13'. It will also be noted that the guard 15 has its end portions cut yaway sufficiently to allow passage of the trip dogs attached to the table.

In Figure 3 the guard is shown as cut away sufficiently. to permit passage of the dogs such as 14 shown in Figures 1 and 2 while in Figure 4 the guard is shown as not cut away as the type of dog there used does not require it. In order to remove the guard it -is merely tipped forward teclear the flange 13 andthen pulled out, there 'beingsufiicient clearance ofthe parts to permit ber extending from the plunger support at the side thereof opposite to the table into telescoping relation with the table flange whereby work chips falling from the table will be conducted past the control parts without interfering with the actuation of the plunger by said dogs,` one of the protecting members being detachably connected to -in all adjustable positions thereof, a guard memits support for ready removal to permit adjustment of the control parts.

2. A milling machine having a bed, a work table reciprocably mounted on the bed, means to control the power movement of the table, including a control member support, a control member mounted therein, control dogs carried by a side face of the table for coacting with said member to determine the automatic movements of the table, a sloping flange carried by the top edgeof the dog carrying side of the table, and extending the full length thereof, said flange projecting fromthe table in overlying relation-.to the .plunger and dogs, a second flange carried by thecontrol member support on the side of the control member opposite to the table, a chip guard detalchably connected to the second named flange and circumscribing the control plunger into overlapping relation with the rst named flange wherebyfallting work chips will precipitate therefrom without interfering with` the actuation of the .control member by the control dogs, and means for readily` removing the chip guard to expose theA parts for adjustment purposes. f Y

3. In a milling machine having a bed and a table reciprocably mounted upon the bed, a control plunger support projecting .beyond Aa sidev of the table and below the plane of the top thereof, a control plunger mounted on said support, control dogs carried by the table for cooperation with said plunger to determine automatically table movement, means to prevent work chips falling from the table from interfering with the actuation of the plunger` by-A said dogs, including a ange sloping vfrom the top edge of the table in koverlying relation'to the dogs and plunger, said :ange extending the full length of the table to ingfrom the plunger support and a groove formed: in the lower edge of the housing fitting said;

flange. Y

. LESTER F.v NENNINGER.

FRED: A.- HASSMAN.

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